2 bar-line.cc -- implement Bar_line
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 #include "all-font-metrics.hh"
15 #include "font-interface.hh"
17 #include "output-def.hh"
18 #include "paper-column.hh"
19 #include "staff-symbol-referencer.hh"
21 MAKE_SCHEME_CALLBACK (Bar_line, print, 1);
24 Bar_line::print (SCM smob)
26 Grob *me = unsmob_grob (smob);
28 SCM s = me->get_property ("glyph");
29 SCM barsiz_proc = me->get_property ("bar-size-procedure");
30 if (scm_is_string (s) && ly_is_procedure (barsiz_proc))
32 String str = ly_scm2string (s);
33 SCM siz = scm_call_1 (barsiz_proc, me->self_scm ());
34 Real sz = robust_scm2double (siz, 0);
38 return compound_barline (me, str, sz, false).smobbed_copy ();
44 Bar_line::compound_barline (Grob *me, String str, Real h,
47 Real kern = robust_scm2double (me->get_property ("kern"), 1);
48 Real thinkern = robust_scm2double (me->get_property ("thin-kern"), 1);
49 Real hair = robust_scm2double (me->get_property ("hair-thickness"), 1);
50 Real fatline = robust_scm2double (me->get_property ("thick-thickness"), 1);
52 Real staffline = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
53 Real staff_space = Staff_symbol_referencer::staff_space (me);
56 thinkern *= staffline;
60 Stencil thin = simple_barline (me, hair, h, rounded);
61 Stencil thick = simple_barline (me, fatline, h, rounded);
62 Stencil dot = Font_interface::get_default_font (me)->find_by_name ("dots.dot");
64 int lines = Staff_symbol_referencer::line_count (me);
66 = ((lines & 1 || lines == 0)
68 : (staff_space < 2 ? 2 : .5)) * staff_space;
70 colon.translate_axis (dist, Y_AXIS);
71 colon.add_stencil (dot);
72 colon.translate_axis (-dist / 2, Y_AXIS);
79 return Lookup::blank (Box (Interval (0, 0), Interval (-h / 2, h / 2)));
82 else if (str == "|." || (h == 0 && str == ":|"))
84 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
85 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
87 else if (str == ".|" || (h == 0 && str == "|:"))
89 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
90 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
94 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
95 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
96 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
100 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
101 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
102 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
104 else if (str == ":|:")
106 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
107 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
108 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
109 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
111 else if (str == ".|.")
113 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
114 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
116 else if (str == "||")
119 should align to other side? this never appears
122 m.add_at_edge (X_AXIS, RIGHT, thin, 0, 0);
123 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern, 0);
127 int c = (Staff_symbol_referencer::line_count (me));
129 for (int i = 0; i < c - 1; i++)
131 Real y = (- (c - 1.0) / 2 + 0.5 + i * staff_space);
134 d.translate_axis (y, Y_AXIS);
142 Bar_line::simple_barline (Grob *me,
149 ? me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"))
152 return Lookup::round_filled_box (Box (Interval (0, w),
153 Interval (-h / 2, h / 2)), blot);
156 MAKE_SCHEME_CALLBACK (Bar_line, before_line_breaking, 1);
159 Bar_line::before_line_breaking (SCM smob)
161 Grob *me = unsmob_grob (smob);
162 Item *item = dynamic_cast<Item *> (me);
164 SCM g = me->get_property ("glyph");
166 Direction bsd = item->break_status_dir ();
167 if (scm_is_string (g) && bsd)
169 SCM proc = me->get_property ("break-glyph-function");
170 g = scm_call_2 (proc, g, scm_from_int (bsd));
173 if (!scm_is_string (g))
175 me->set_property ("print-function", SCM_EOL);
176 me->set_extent (SCM_EOL, X_AXIS);
177 // leave y_extent for spanbar?
180 if (! ly_is_equal (g, orig))
181 me->set_property ("glyph", g);
183 return SCM_UNSPECIFIED;
186 MAKE_SCHEME_CALLBACK (Bar_line, get_staff_bar_size, 1);
188 Bar_line::get_staff_bar_size (SCM smob)
190 Grob *me = unsmob_grob (smob);
191 Real ss = Staff_symbol_referencer::staff_space (me);
192 SCM size = me->get_property ("bar-size");
193 if (scm_is_number (size))
194 return scm_from_double (scm_to_double (size) * ss);
195 else if (Staff_symbol_referencer::get_staff_symbol (me))
198 If there is no staff-symbol, we get -1 from the next
199 calculation. That's a nonsense value, which would collapse the
200 barline so we return 0.0 in the next alternative.
202 Real ysize = (Staff_symbol_referencer::line_count (me) -1);
203 ysize = ysize * ss + Staff_symbol_referencer::line_thickness (me);
204 return scm_from_double (ysize);
206 return scm_from_int (0);
209 ADD_INTERFACE (Bar_line, "bar-line-interface",
212 "Print a special bar symbol. It replaces the \n"
213 "regular bar symbol with a special\n"
214 "symbol. The argument @var{bartype} is a string which specifies the\n"
215 "kind of bar to print. Options are @code{:|}, \n"
216 "@code{|:}, @code{:|:},\n"
217 "@code{||}, @code{|.},\n"
218 "@code{.|}, and @code{.|.}. \n"
220 "These produce, respectively, a right repeat, a left repeat, a double\n"
221 "repeat, a double bar, a start bar, an end bar, and a thick double bar.\n"
222 "If @var{bartype} is set to @code{empty} then nothing is printed,\n"
223 "but a line break is allowed at that spot.\n",
224 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");